c# - Moving Object with Paint Event -

i have test tomorrow, , must use paint event redraw our objects, may not use timer.

as msdn says: "the paint event raised when control redrawn.", that,occurs known, when form minimized, or got invisible , visible.

my code:

public partial class form1 : form {     public graphics drawarea;     public int xpos, ypos;      public form1()     {         initializecomponent();     }     private void form1_paint(object sender, painteventargs e)     {         drawarea = e.graphics;         drawuser();     }      private void form1_keydown(object sender, keyeventargs e)     {         switch (e.keycode)         {              case keys.down:                 ypos++;                 break;             case keys.up:                 ypos--;                 break;             case keys.left:                 xpos--;                 break;             case keys.right:                 xpos++;                 break;         }     }      private void drawuser()     {         drawarea.fillrectangle(new solidbrush(color.red), xpos, ypos, 50, 50);     } } 

so, when press key arrows multiple times, object moves after re-size form. want move instantly, using paint event.

thanks

i found it!

by adding this.invalidate(); after key pressed. tell paint event redraw.